IRPT2051

The IRPT2051C provides the complete power conversion function for a 3hp (2.2kW) variable-frequency, variable-voltage, AC motor controller. The combines a power assembly IRPT2051A with a Driver-Plus Board IRPT2051D. Figure 1 shows the block diagram of the within an AC motor control system.

The power module contains a 3-phase input bridge rectifier, 3- phase IGBT and diode, 3-phase IGBT inverter, current sense shunts, and a thermistor. The IRPT2051 is designed for easy mounting to a heat sink.

The Driver-Plus Board contains DC link capacitors, capacitor soft charge function using NTC thermistor, surge suppression MOVs, IGBT gate drivers, DC bus voltage and current feedback signals, protection circuitry and local power supply. The IRPT2051 is designed to mate with a controller board through a single row header. Terminal blocks are also provided on the Driver-Plus Board for all end-user line input, motor output, and brake resistor.

Output power is Pulse-Width Modulated (PWM), 3-phase, variable-frequency, variable voltage controlled by an externallygenerated user-provided PWM controller for inverter IGBT switching. The power supply offers the user non-isolated 5V and 15V to power the microcontroller.